-99.4% is the change from 498 to 3
Calculation steps:
[( 3 - 498 ) ÷ 498] x 100 = -99.4%
Formula
Percentage change = [(3 - 498) / 498] x 100
Subtract the new number by the original number
3 - 498 = -495
-495 ÷ 498 = -0.9939759036144579
-0.9939759036144579 x 100 = -99.4%